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Cortinarius privignoides

[Basidiomycetes > Agaricales > Cortinariaceae > Cortinarius ... ]

by Michael Kuo

One of several white-stemmed, medium-sized, boring "telamonias" in the Cortinarius armeniacus group, Cortinarius privignoides is a European species separated from the others on the basis of its spongy, swollen stem base; its brownish (rather than yellowish) young gills, with edges that often remain whitish and finely jagged into maturity; and its silky white cap margin. It is reported under various conifers and under birch. In eastern North America we have a Cortinarius that qualifies, and which I have illustrated and decscribed here . . . but it may not actually represent the same genetic species as the European Cortinarius privignoides. For a similar North American mushroom found in oak-hickory forests, see Cortinarius species 01.

Description:

Ecology: Mycorrhizal with conifers; growing gregariously; fall; eastern North America (the described and illustrated collection was made in Kentucky; Phillips [1991/2005] reports the species from New York).

Cap: 5-7 cm; convex or bell-shaped at first, becoming broadly bell-shaped, convex, or nearly flat; dry; silky; dull coppery orange to orangish brown; the margin with a thin white zone of silkiness.

Gills: Attached to the stem; close; dull brownish when young, becoming rusty brown; edges often whitish and finely jagged; covered by a whitish cortina when young.

Stem: 5-6 cm long; up to 1.5 cm thick at the apex; tapering to a club-shaped, swollen base; dry; silky; whitish to faintly brownish (European descriptions list the stem as very faintly purplish to bluish when very young); sometimes with poorly defined ring zones; basal mycelium whitish.

Flesh: Whitish to pale brownish in stem; firm in cap, spongy in stem base.

Odor: Not distinctive.

Chemical Reactions: KOH gray on cap surface and on flesh.

Spore Print: Rusty brown.

Microscopic Features: Spores 7-10 x 4.5-6 µ; ellipsoid; weakly verrucose. Cheilo- and pleurocystidia absent. Pileipellis a thin epicutis of hyaline elements over a subcutis of wider, brownish, encrusted elements.

REFERENCES: Henry, 1985. (Moser, 1983; Phillips, 1986 [as C. privignus]; Phillips, 1991/2005; Hansen & Knudsen, 1992; Breitenbach & Kränzlin, 2000.) Herb. Kuo 09241107.

Further Online Information:

Cortinarius privignoides at Roger's Mushrooms

 

Cortinarius privignoides

Cortinarius privignoides

Cortinarius privignoides
KOH

Cortinarius privignoides
Spores

Cortinarius privignoides
Pileipellis



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Cite this page as:

Kuo, M. (2011, December). Cortinarius privignoides. Retrieved from the MushroomExpert.Com Web site: http://www.mushroomexpert.com/cortinarius_privignoides.html